Transmission mechanism



Oct: 3o, 1923. 1,472,7y4`

T. .1. MCCLOSKEY TRANSMISSION MECHANISM giled Jan. 25. 1922 5sheets-sheet l Oct. 30 1923. 1,472,724

, T. J. MCCLOSKEY TRANsMssIoN MEGHANISM Filed Jan'. 25. 1922 ssheets-Snet 2 0:5

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' T. J. MCCLOSKEY TRANSMISSION MECHANISM Filed Jan. 25. 1922 86 3Sheets-Sheet 5 H. 4.

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Patented Oct. 30, 1923.

UNITED STATES PATENT OFFICE.

THOMAS J'. MCCLOSKEY, OF SEATTLE, WASHINGTON, ASSIGNOR TO UNIVERSALTRANSMISSION COMPANY, OF SEATTLE, -WASHINGTON.

TRANSMISSION MECHANISM.

Application filed January 25, 1922.

To alt whom t may concern:

Be it known that l, THoMAs J.n McCLosnur, a citizen of the UnitedStates, residing at Seattle, in the county of King and State ofWashington, have invented certain new and useful Improvements inTransmission Mechanisms; and I do hereby declare the following to be afull, clear, and exact descri ption of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The present invention relates to transmission mechanisms, and appertainsmore particularly to variable speed transmission gearing using clutchesfor obtaining various speed ratios.

It an object of the invention to provide 'a variable speed transmissiongearing comprising a novel arrangement and combination of gears andclutches, for obtaining a desired variety of speed ratios or changes bythe simple forward and backward. movement of a hand lever or othercontrolling' member.

Another object is the provision of such a mechanism comprising a novelconstruction having improved details, to enhance the utilitjy7 andefficiency of the device, and providing a compact and serviceablemechanism.

A further obj J,ct is the provision of such a gear mechanism having anovel and eilicient shifting device for changing the speed ratios Astill further object is to incorporate in the t 1ansmission mechanism anovel and improved brake, which requires very little extra space in thestructure.

With the foregoing and other objects in view, which will be apparent asthe description proceeds, the invention resides in the construction andarrangement of parts, as hereinafter described and claimed, it. beingundf-rrstood that changes can be made within the scopo of what isclaimed, without departing from the spirit of the invention'lheinvention is illustrated in the accompanying drawings, wherein AFigure 1 is a vertical median section of the transmission mechanism,portions being shown in elevation.

Figs, 2 and 3 are vertical cross sections taken on the respective lines2-2 and 3 8 of Fig. 4 is a horizontal section of the brake- Serial No.531,706.

operating device, taken on the line 4-4 of Fig. 3.

yhe gears are housed within a casing 10, which, as shown, is of suchform and construction that it may be interposed between the rear end ofan ordinary transmission housing lfi of an automobile engine, and thepropeller shaft housing 12, although the present mechanism is notlimited to such use. However, the mechanism can, if desired, be used asan auxiliary or supplementaryv speed change mechanism between the usualspeed-change mechanism and propeller sin. i, in which relation thepresent mechanism is shown in Fig. 1. Thus, the forward end of thecasing 1() has an inturned fiange 13 adapted to be secured by bolts 14to the outturned flange 15 at the rear end of the housing 11, and thecasing 10 has a neck 16 at its rear end provided with an outturnedflange 17 to be fastened by bolts 18 to the outturned flange 19 on theforward end of the housing 12. Thus, in using the mechanism in thisrelation, the drive shaft 2O of the main or primary transmissionmechanisin has the universal joint 21 at its rear end provided with thestub 22, and the propeller shaft 24 locatedwithin the housing 12 has asocket 23 which ordinarily receives the stub 2, when the housings 11 and12 are secured directly together. In other words, with the presentmechanism removed, the flanges 15 and 19 are secured together, so thatthe stub 22 lits within the socket 23, thereby driving the shaft 24 fromthe shaft 20,` whereas, in using the present mechanism, the housings 11and 12 are separated and the casing 1() is secured between and to theadjacent ends of said housings. As shown, the neck 16 projects beyondthe flange 17, as at 25, to lit within the forward enlarged end of thehousing 12.

The present transmission mechanism includes a shaft 26 mounted within.the casing 10 between and in line with the shafts 20 and 24, and theshaft 26 has a socket 27 in its forward end, similar to the socket 23,for receiving),- the stub 22, whereby the shaft 26 is driven by and withthe shaft 20. Y The forward terminal of the shaft 26 is rotatable withina roller bearing 28 mounted within the rearwardly-extending cuff 29 of aflared annular member 30 which has an outturned flange 31 clampedbetween the flanges 13 and l5. The rea-r terminal of the shaft 26 ismounted in roller bearing 32 dis osed within a forwardly-opening recess3a of a journal member Said journal member has a stub 35 at its rear endto entf-,r the socket 23, whereby the propeiler shaft 24 rotates withthe member` 34. rllhe member 34 is mounted for rotation in a rollerbearing 3G which is fitted within the neck 1G. Thus, the forward end ofthe shaft 2G is mounted for rotation in a bearing at the forward endofthe casing l0, while the rear end of said shaft is mounted in thebearing in the member 34 which is in turn mounted in a bearing` withinthe rea-r end portion of the casing. j

The journal member 34 has a cup-shaped rim portion 37 at its forward endsurround ing andspaced from the shaft 2G, and formed thereon withexternal gear teeth 33, forming a gear wheel, and said portion 37 hasclutch lugs 39 on the interior at the edge or mouth of said portion. Agear wheel 40 is mounted loosely on the shaft 26 near the forward endthereof, and has a clutch socket 4l. clutch sleeve and gear member 42are slidable on the shaft 2G between the gear wheel 4G and journalmember 34, and is feathered or splined to said shaft, in yorder torotate with the shaft 2S. rllhe sleeve 42 is formed at its forward andrear ends with the clutch lugs or portions 43 and 44, respectively, toengage the clutch socket 4l and clutch lugs 39, respectively, w ien thesleeve 42 is shifted forwardly. and rearwardly. rlhe lugs 43 in enteringthe socket 41 will lock the gear wheel 40 and sleeve 42 together,thereby rotating the gear wheel 40 with the sleeve 42 and shaft 26, andthe lugs 44 in passing between the lugs 39, will lool; the journalnember to the shaft 26, to rotate the member 34 and shaft 24 with theshaft 2G. The lugs 44 can be moved beyond the lugs 39 in order todisconnect the member from the shaft 26, that is, for rotation together.

The sleeve 42 is formed between the clutch lugs 43 and 44 with externalgear teeth forming a gear wheel 45., and the sleeve is formed at onesidc of the g'ear wheel 45 with an annular groove 46. A gear wheel 4l'n'ieshrs with the wheel 45 and is shrouded at one side by an annularflange 4S which enters the groove 4G, thereby compelling the gear wheel47 to be shifted or slid with the sleeve 42 backward and forward. rllhegear wheel 4T is mounted loosely on a sleeve shaft 49 which is mountedfor rotation on an arbor 50 having its terminals secured within adropped portion. of the casing l() below the shaft 26. Roller bearings5l arey disposed between the shaft 49 and arbor 59, for the freerotation of said sl aft. Ahe tubular Shaft 49 has a gear wheel 52thereon at its forward end meshing with the gear wheel 40, and saidshaft 49 has a gear wheel 53 at its rear end meshing with the gear wheel39, the gear wheel 47 being slidable between the gear wheels 52 and 53.rlhe gear wheel 52 is also shrouded by the flange 52 which overlaps thegear wheel 40 and holds said gear wheel 40 in place. The gear wheel 53has clutch lugs 54 to enter a clutch socket Ff' 1 f" eo in the ieai.side of the geai wheel 4J, when the sleeve 42 is slid rearwardly to thelimit, with the lugs 44 moved beyond the lugs 39./A

rlhe casing 'IO has a cover 56 formed with an upstanding hollow post orstandard 57, and a guide rod 58 has its terminals secured in the baseportion of the post 57 above and parallel with the shaft 23. el clutchshifter 59 is slidable onV the rod 5S, and has a depending forli G9straddling the sleeve 42 and engaging in the groove 4G, whereby to slidethe sleeve 42 with the :neinber or shifter 59. Said member 59 has anupper notch of slot (El receiving the lower rounded end 62 of a handlever 93 whichextends through a fulcrinn member (34 mounted foroscillatory movement in the upper end portion of the post 57. Said postis formed at its upper end with a bearing (S5 for the fulcrum member G4,and the lower arm of the lever is swineable forward and rearwardlywithin the pest 5? to slide or shift the member 59. Vihe sleeve 42 moveswith the member 59 and the gear wheel 4T moves w'tb the sleeve 42, sothat the member 59, sleeve 42, and gear wheel. are shifted as a unit.

Means are provided for retaining the shiftable parts in the differentpositions, and such means includes opposite bosses 66 projecting fromthe sides of the member 59, and said bosses are tabular or hollow. Pinsor catches G7 are slidable in tie inner ends of the bosses 6G and haverounded ends to snap into eoncaved notches (SS in the opposite sidesofthe rod 58, and coiled expansion springs 69 are disposed within saidbosses and are confinedY between the pins GT and plugs 'TOscrew-tlnezuled into the outer ends of said bosses. The notches 89 areso arranged or spaced apart to receive the pins 67 when the shiftablemembers are moved to their different positions, thereby retaining themin such positions against accidental shifting movement, although whenthe lever is swung manually, the pins or atches G7 will be forced backinto the bosses 6G out of the corresponding notches to snap into thenext adjacent notches when the memberV 59 is slid.

The brake, which is incorporated in the mechanism, includes cup-shapedbrake drum Tl secured or keyed on the shaft 26, within the forward endportion of the casing l0, with its flange or rim projecting forwardly.The hub 72 of the drum 7l is secured on said shaft 26, and abuts the hub73 of the gear wheel 40, as shown, and said hubs are rotatable within anopening 74 in a partition 75 of the casing. Said partition divides thecasing into a main compartment or chamber in which the gears andclutches are located, and a forward brake chamber or compartment 76 inwhich the brake drum 7l is located, with the rim of the drum surroundingthe member S9. The chamber 76 has a removable cover 77 for access to thebrake device.

A brake band 78 surrounds the rim of the drum 71 and has the terminalears or portions 79 and 8O fitted slida-bly on a transverse roc-k shaft8l journaled within the sides of the chamber 76 above the brake drum. Aspacer 82 is disposed on said shaft between the ear 79 and correspondingside walls of the casing, and an arm 83 is secured to one protruding endof the shaft, for the oscillating movement of said shaft by any suitableoperating device. In order to contract the brake band 78, the ear orportion has a sleeve 84 on the shaft 8l projecting toward thecorrespondingside wall of the casing, and a collar is secured on saidshaft to turn therewith. The adjacent abutting ends of the sleeve 84 andcollar 85 have cam faces 86, which will compel the sleeve 84 to'be slidtoward the ear 7 9, when the shaft is turned, thereby moving the ends ofthe brake band toward one another, for causing the brake band to grip orembrace the brake drum 71, and thus retard or stop the rotation of theshaft 26 and parts connected thereto.

In operation, the several speed changes are obtained by the simpleforward and backward swinging movement of the hand lever 63 to.different positions. When the hand lever is swung to the position asseen .in Fig. l, the mechanism is a neutral position, with all of theclutches open. By swinging the hand lever 63 to move the member 59forwardly, the sleeve 42 is slid forwardly to engage the clutch lugs 43in the clutch socket 4l o f the gear wheel 40, thereby connecting thegear wheel 40 with the shaft 26 to rotate therewith. The gear wheel 40will rotate the gear wheel 52 and sleeve shaft 49, thereby rotating thegear wheel which transmits the. motion to the r wheel 38 and journalmember 34, so

. as to rotate the shaft 24. When the sleeve 42 :is shifted rearwardlyfrom neutral position one step, the clutch lugs 44 engage hciween theclutch lugs 39, thereby connect ingthe journal member 34 with the shaft2C- and resulting in the journal member 34 propeller shaft 24 rotatingwith the shaft 26. By moving the sleeve 42 rearwardly another step, theclutch lugs 44 are moved from between and rearwardly of the luga 39,thereby disconnecting the journal member 34 from the shaft 26, and thegear wheel 47 is then brought into engagement with the gear wheel 58,the clutch lugs 54 engaging in the clutch socket 55, whereby the gearwheel 47 in being driven by the gear wheel 45 of the sleeve 42, willrotate the gear wheel 53 and transmit the motion te the journal member34 and shaft 24. The shifting of the sleeve 42 and gear wheel 47 is ofcourse done when the main clutch (not shown) is open, to avoid thestripping of gears or breakage of other parts.

Three speeds are thus obtained. Thus, when the sleeve 42 engages thegear wheel 40, said gear wheel 40 being of larger diameter than the gearwheel 52, will rotate the shaft 49 faster than the shaft 26, therebyrotating the shaft 24 faster than said shaft 26. When the sleeve 42 hasits lugs 44 engaged with the lugs 39, the shaft 24 is rotated at thesame speed as the shaft 26. lV hen the gear wheel 47 is engaged with thegear wheel 53, the gear wheel 45 being of smaller diameter than the gearwheel 47 will rotate the sha-ft 49 and gear wheel 53 slower than theshaft 26, whereby the shaft 24 is rotated slower than said shaft 26. Inthis way, in the three different clutch positions of the mechanism, theshaft 24 which is driven by the mechanism can be made to rotate fasterthan, at the same speed as, or slower than the shaft 26. The mechanismthus provides an eliicient supplementary or auxiliary speed changinggearing, which is especially useful on trucks, or other vehicles havingvarying loads. If the mechanism is used in conjunction with the usual ormain transmission mechanism, the speed changes of the primarytransmission mechanism are multiplied by three. In other words, witheach speed change of the main transmission mechanism, each of the speedchanges of the present mechanism can be used, so that if the main,mechanism has three speed changes, the three speed changes of thepresent mechanism` will provide for six speed changes in using the twomechanisms in con'ibination.

Having thus described the invention, what is claimed as new is l. Atransmission gearing comprising a shaft, a second shaft, a third shaftparallel with the first named shaft, a member rotatable with the secondshaft, a sleeve slidable on and rotatable with the first named shaft,said member and sleeve having clutch portions to engage one another inone position of said sleeve, gears connecting said member and thirdshaft, a wheel slidable on the third shaft and freared to and movablewith said sleeve, clutch portions between said wheel and third shaft toconnect said wheel and third shaft in another position of said sleeve,and a wheel rotatable relatively to ythe first named shaft geared to thethird lsov shaft, the last named ".vheel and sleeve having' clutchportions to engage in still another position of the sleeve.

2'. ln a transmission gearing', a shaft, a

second shaft parallel therewith, a sleeve slidable 011 and rotatableWith the first naines. shaft, a gear wheel mounted loosely on the secondshaft, said sleeve having Agear teeth meshing` with said Wheel, saidsleeve and wheel having intei'engagirig,` portions for sliding one withthe other including an annu lar groove in one of them and an annularflange on the other engaging in said groove, andv gears for theengagement of said sleeve and Wheel when slid to different positions.

2. ln a transmission meehanism a shaft, a second shaft inV alinementtherewith, a third shaft parallel with the first named shaft, a gearwheel. rotatable with the second shaft, a gear wheel secured to thethird shaft and meshing .viththe tirst named gear wheel, air 1=ther gearwheel on the third shaft, a gear 1vvheel meshing` with the third namedL@gear v-:heel and mounted loosely on the first named shaft, a sleeveslidable on and rotatable with the first named shaft between the firstand fourth named gear ivheels and having` a gear wheel thereon, and agear Wheel mounted loosely on the third shaft and mesh` ing' with thelift h named gear .vheel and slidable as a unit with said sleeve, saidsleeve and first fourth named ear wheels having clutch portions toengage in different positions of said sleeve, the second and sixth gearWheels having clutch portions to engage in still another position of thesleeve, one of said clutch portions beim@r engageable and thendisengageable in one movement of said sleeve to brine` another one ofsaid clutch portions into engagement.

4.. ln a transmission gearing', a shaft, a member having a cuppedportion surrounding;` said shaft and formed with a gear wheel thereon, asecond shaft` geared to said gear wheel, a sleeve slidable n androtatable with the first named shaft, one end of the sleeve beingvmovable into said portion and said sleeve and portion having` clutchlugs to engage and disengaee vvhen the sleeve is moved into saidportion, and gears and clutch portions between said sleeve and secondshaft to connect the shafts when the sleeve is in a posit-ion vvith saidClutch lugs disengaged,

A transmission gearing` including a shaft, a member rotatable about theaxis thereof and having a cupeshaped portion siirroundingr` the shaftand formed thereon with a gear. Wheel, a second sha-ft having,` a gearWheel meshing With the named first gear Wheel, a sleeve slidable on androtat-A able With thefirst named shaft, one end of the sleeve-beingmovable into said portion and said end of the sleeve and portion havingclutch lugs to engage one another and disenga'ge vvhen the sleeve ismoved into said portion, a gear Wheel mounted loosely on the secondshaft and geared to and slidable with said sleeve, and clutch portionsbetiveen the second and third named gear Wheels t I engage one anotherwhen the lugs of the sleeve have been mo fed past the lugs of saidportion.

6. A transmission gearin including` a shaft, a member rotatable aboutthe axis thereof having' a cup-shaped portion surrounding said shaft andformed thereon with a gear Wheel, a second shaft parallel With the namedshaft, a gear ivheel secured on the second shaft and meshingl with thefirst named rear Wheel, a sleeve slidable on and rotatable with thefirst named shaft, one end of the sleeve being movable into said portionand said end of the sleeve and portion having` clutch lugs to engage oneanother and disent'age when the' sleeve is moved into said portion, gearWheel mounted loosely on the second shaft and `seared to and slidableWit" said sleeve, the second and third named gear Wheels havingclutchportions to engage ivhen the lugs of the sleeve are moved past the lugsof said portion, and a` gear Wheel mountedl loosely ou the first namedshaft and geared to the second shaft, the last named gear wheel andsleeve having clutchy portions to engage when the sleeve is Withdrawnfrom said eupshaped portion.

7. ln a transmission gearing, a. journal member having,l a recess, ashaft having one end monntedfo;l rotation in said recess, said journalmember having a cup-shaped portion surrounding said shaft and formedthereon with a lgear Wheel, a second gear Wheel meshing with said ,ogearWheel, a sl eve slidable on and rotatable with said shaft, one end ofthesleeve being movable into said portion and said end of the sleeve andportion havingl clutch lugs to engage and then disengage when the sleeveis moved into said portion, and means for connecting,- the second namedgeall Wheel and shaft when the lugs of the sleeve have been moved pastthe lugs of said portion in entering said portion.

8. A transmission gearing' comprising a shaft, a journal member having arecess receiving one end of said shaft and having a oup-shaped portionsurrounding said shaft and formed thereon With a gear wheel, a secondshaft parallel With the first named shaft, av gear Wheel on the secondshaft meshing,- with the first named gear Wheel, a sleeve slidable onand rotatable with the Vhrst named shaft, one end of the sleeve beingrmovable into said portion and said end of the sleeve and portion havingclutch lugs to engage and disengage one another when the slee-ve ismoved into said portion, a gear Wheel mounted loosely on the secondshaft and geared to and slidable with said sleeve,

the second and third named gear Wheels having Clutch portions to engagewhen the lugs of the sleeve are move@l past the lugs of Said Cup-shapedportion, e gear wheel mounted loosely on the first named shaft, and agear Wheel secured to the second shaft and meshing with the fourth namedgear Whe-e1, the sleeve and fourth named gear Wheel having clutchportions to engage when the sleeve is moved away from seid 10 cup-shapedportion.

In testimony whereof I have signed my neme to this specification in thepresence of two subscribing witnesses.

THOMAS J. MCCLOSKEY.

Witnesses:

J. L. FITZPATRICK, R. C. FRANKIE,

